get error

<br />
<b>Warning</b>:  require(/data01/virt30108/domeenid/www.tehnopol.ee/livinglabsummit/wp-includes/functions.php): Failed to open stream: No such file or directory in <b>/data01/virt30108/domeenid/www.tehnopol.ee/livinglabsummit/wp-settings.php</b> on line <b>111</b><br />
<br />
<b>Fatal error</b>:  Uncaught Error: Failed opening required '/data01/virt30108/domeenid/www.tehnopol.ee/livinglabsummit/wp-includes/functions.php' (include_path='.:') in /data01/virt30108/domeenid/www.tehnopol.ee/livinglabsummit/wp-settings.php:111
Stack trace:
#0 /data01/virt30108/domeenid/www.tehnopol.ee/livinglabsummit/wp-config.php(166): require_once()
#1 /data01/virt30108/domeenid/www.tehnopol.ee/livinglabsummit/wp-load.php(37): require_once('/data01/virt301...')
#2 /data01/virt30108/domeenid/www.tehnopol.ee/livinglabsummit/wp-blog-header.php(13): require_once('/data01/virt301...')
#3 /data01/virt30108/domeenid/www.tehnopol.ee/livinglabsummit/index.php(26): require('/data01/virt301...')
#4 {main}
  thrown in <b>/data01/virt30108/domeenid/www.tehnopol.ee/livinglabsummit/wp-settings.php</b> on line <b>111</b><br />